/Engine/Plugins/Interchange/Runtime/Source/FactoryNodes/Public/InterchangeAnimSequenceFactoryNode.h
Return how many animated material curve suffixes this anim sequence drive (curve areFRichCurveof type float).
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Interchange | Node | AnimSequence") int32 GetAnimatedMaterialCurveSuffixesCount() const